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题型:填空题 题类:常考题 难易度:容易
两位数减整十数(不退位)990(10题)
59-40=
87-20=
59-20=
87-60=
89-70=
28{#blank#}1{#/blank#}27 81{#blank#}2{#/blank#}91 91{#blank#}3{#/blank#}89
40+7{#blank#}4{#/blank#}55-5 69-9{#blank#}5{#/blank#}40+20
100-60{#blank#}6{#/blank#}48-8 30+3{#blank#}7{#/blank#}20+20
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